Update gin.md

Changed this:
`In your router file, define the handlers for the GraphQL and Playground endpoints in two different methods and tie then together in the Gin router:
`
to: 
`In your router file, define the handlers for the GraphQL and Playground endpoints in two different methods and tie them together in the Gin router:
`

docs/content/recipes/gin.md

@@ -16,7 +16,7 @@ Install Gin:
 $ go get github.com/gin-gonic/gin
 ```
 
-In your router file, define the handlers for the GraphQL and Playground endpoints in two different methods and tie then together in the Gin router:
+In your router file, define the handlers for the GraphQL and Playground endpoints in two different methods and tie them together in the Gin router:
 
 ```go
 import (